Dust arrester



06k. 13, 1936. GERARD 2,057,568

DUST ARRESTER Filed March 24, 1936 Inventor Zefer rara? reamed 0a. 13,1936 UNlTED STATES PATENT OFFICE 2 Claims.

The present invention relates to new and useful improvements in dustarresters particularly for the pipes of hot air furnaces but it will beunderstood, of course, that an arrester in accordance with the presentinvention may be used for any purpose for which it may be adapted anddesirable.

An important object of the invention is to provide, in a manner ashereinafter set forth, a dust arrester which may be expeditiouslyinterposed in a hot air furnace pipe or other duct in a comparativelyshort time and with a minimum of labor.

Another very important object of the invention is to provide a dustarrester of the aforementioned character embodying a filtering unitwhich may be easily removed when desired for cleaning or other purposes.

Other objects of the invention are to provide a dust arrester of thecharacter described which will be comparatively simple in construction,strong, durable, highly efilcient and reliable in use, compact and whichmay be manufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawing whereinlike characters of reference designate corresponding parts throughoutthe several views, and wherein:-

Figure 1 is a view in side elevation, showing a dust arresterconstructed in accordance with the present invention interposed in a hotair furnace Figure 2 is a cross sectional view, taken substantially onthe line 22 of Figure 1.

Figure 3 is a vertical sectional view, taken substantially on the line3-3 of Figure 2.

Figure 4 is an elevational view of the filtering unit, showing thehingedly connected screens swung to open position, a portion of thefiltering medium being broken away and a portion of one of the screenframes being broken away in section.

Figure 5 is a detail view in perspective of the filtering medium.

Referring to the drawing in detail, it will be seen that the embodimentof the invention which has been illustrated comprises a substantiallyfiat, square casing which is designated generally by the referencenumeral I and which is adapted to be interposed between the sections 2of a hot air furnace pipe or other duct. The metallic casing I includesopposed walls 3 having aligned circular openings therein from whichannular flanges 4 project in opposite directions. The flanges 4 areengageable in the adjacent end portions of the pipe sections 2 forsecuring the casing I in position therebetween.

The substantially fiat casing I is open at one edge for the reception ofa removable filtering unit which is designated generally by thereference numeral 5. The unit 5 comprises a pair of screens 6 ofsuitable mesh the marginal portions of which are enclosed in metallicbindings or frames I. The frames 1 are hingedly connected through themedium of aligned eyes 8 through which a pin 9 is inserted. Thereference numeral l0 designates a non-inflammable filtering medium ofsuitable material, such as steel wool, asbestos fiber, etc. which isclamped between the hingedly connected screens 6. At the opening in thecasing I which is provided for the insertion and removal of thefiltering unit 5 of the walls 3 of said casing are flared, as at I I(see Figure 3) to facilitate inserting and removing said filtering unit.

Itis thought that the operation of the device will be readily apparentfrom a consideration of the foregoing. As the dust laden air from thehot air furnace I2 or any other source passes through the filtering unit5 the dust is separated from said air and retained by the medium orelement Ill. The unit 5 may be expeditiously removed from the casing Ifor cleaning or replacing the filtering medium to. If desired, suitablemeans may be provided for securing the hinged screens 6 in folded orclosed position with the filtering medium I0 clamped therebetween. Whilein the drawing the casing I has been shown with the opening thereinwhich receives the unit 5 uppermost, said casing may obviously bepositioned between the pipe sections 2 with the aforementioned openingtherein on one side or at any other point to receive said unit 5.

It is believed that the many advantages of a dust arrester constructedin accordance with the present invention will be readily understood, and

duct, said casing further having a flared opening in one side thereof,and a removable filtering unit slidably insertable in the casing throughthe last-named opening, said filtering unit including a pair ofopposed,hingedlyconnected screens, having a removable filtering elementmounted-between said screens and said casing further including aninternal channel within which the edges of the screen are seated.

2. A dust arrester of the class described comprising a substantiallyflat, polygonal casing adapted to be interposed between a pair of airduct sections, said casing including opposed walls having alignedopenings therein for establishing communication between the air ductsections, an-

'nular flanges projecting outwardly from said walls and engageable inthe air duct sections. said casing further having a flared lateralopening therein exteriorly oi the air duct sections, and a removablefiltering unit slidnbly insertable in the casing through the last-namedopening and snugly fitted between the walls of the casing, said unitincluding a pair of screens, frames enclosing the marginal portions ofsaid screens, aligned eyes on said frames, a pin extending throughtheeyes for hingedly connecting the frames together, and a removablefiltering medium mounted between the screens.

PETER GERARD.

